private void OnCanvasViewMouseMove(object sender, MouseEventArgs e)
{
if (this.isMouseDown)
{
Point point = new Point(e.X, e.Y);
int num = point.X - this.lastClientMousePt.X;
int num2 = point.Y - this.lastClientMousePt.Y;
if ((num != 0) || (num2 != 0))
{
CanvasView canvasView = this.canvasControl.CanvasView;
double num3 = canvasView.ConvertExtentXToCanvasX((double)num);
double num4 = canvasView.ConvertExtentYToCanvasY((double)num2);
PointDouble viewportCanvasOffset = canvasView.ViewportCanvasOffset;
PointDouble num6 = new PointDouble(viewportCanvasOffset.X - num3, viewportCanvasOffset.Y - num4);
canvasView.ViewportCanvasOffset = num6;
this.lastClientMousePt = point;
}
}
}
